Portsmouth Rhode Island Weather Almanac
Sunday, May 4, 2025
Mostly Cloudy early, Partly Cloudy Day to Cloudy PM, Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		May 4, 2025								Record					Record
Observed Daily Data		2025		2025		Norm		Depart		Highest					Lowest
Maximum Temperature		72		60		61		+11		87		in	2001		50		in	1987
Minimum Temperature		56		41		45		+11		58		in	2001		33		in	1964
Average Temperature		64		51		53		+11		73		in	2001		42		in	1911
Month Avg Max Temperature		66.5		60.0		60.5		+6.0		83.8		in	2001		51.3		in	1920
Month Avg Min Temperature		51.0		43.5		44.8		+6.3		54.5		in	2001		34.8		in	1964
Month Average Temperature		58.8		52.0		52.8		+6.0		69.5		in	2001		45.5		in	1917
High Heat Index										86		in	2001
Low Wind Chill				40											26		in	1986
Heating Degree Days		1		14		12		-11		23		in	1911		0		in	2010
Month Heating DD		25		52		49		-24		78		in	1917		1		in	2001
Season Heating DD		4840		4783		5222		-382		6309		in	1904		4348		in	2012
Cooling Degree Days		0		0		0		+0		8		in	2001		0		in	All
Month Cooling DD		0		0		0		+0		19		in	2001		0		in	Many
Year Cooling DD		0		0		0		+0		19		in	2001		0		in	Many
Maximum Dew Point		63		49		49		+14		63		in	2025		23		in	1986
Minimum Dew Point		54		38		37		+17		54		in	2025		15		in	1986
Average  Dew Point		59		44		43		+16		59		in	2025		19		in	1986
Month Avg Max Dew Point		57.5		50.8		48.8		+8.8		58.3		in	2010		28.3		in	1952
Month Avg Min Dew Point		45.3		39.5		36.8		+8.5		47.5		in	2010		16.8		in	1974
Month Average Dew Point		51.8		45.5		42.8		+9.0		52.9		in	2010		25.3		in	1957
Precipitation		.00		.00		.12		-.12		2.41		in	1893
One Hour Rain		.00		.00						.42		in	1987
Half Hour Rain		.00		.00						.30		in	2021
Hourly Rain Rate		.00		.00						2.22		in	2021
Month Precipitation		.19		.10		.49		-.30		2.92		in	1900		.00		in	2015
Year Precipitation		12.99		23.02		16.22		-3.23		31.53		in	1983		9.77		in	1927
Snow		0.0		0.0		0.0		+0.0		0.0		in			0.0		in	Many
Snow Depth		0		0		0				0		in			0		in	Many
Month Snow		0.0		0.0		T				T		in	1995		0.0		in	Many
Season Snow		11.9		12.7		33.8		21.9		84.1		in	1996		5.0		in	1998
		May 4, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		96%		93%		87%		+9%		100%		in	2015		54%		in	1967
Minimum Humidity		71%		58%		49%		+22%		92%		in	2012		16%		in	1980
Average Humidity		84%		76%		68%		+15%		96%		in	2012		40%		in	1952
Maximum Barometer		30.06		30.38		30.04		+00.02		30.55		in	1990		29.61		in	1983
Minimum Barometer		29.94		30.25		29.82		+00.12		30.29		in	1993		29.12		in	1984
Average Barometer		30.00		30.32		29.93		+00.07		30.36		in	1993		29.39		in	1984
Average Wind		7.9		5.6		7.0		+0.9		15.2		in	1981		2.4		in	2009
Direction		S		NE		SSW				NNE					SSE
High Wind Gust		24		21		24		-0		46		in	2014		12		in	2022
Direction		SSW		NE		SSE				W					S
Maximum Water Temp		55.4		51.8		51.8		+3.6		58.6		in	2007		46.4		in	2020
Minimum Water Temp		52.5		49.8		48.8		+3.7		52.5		in	2025		42.6		in	2020
Average Water Temp		54.0		50.8		50.3		+3.6		54.7		in	2007		44.5		in	2020
Sunrise/ AM Twilight		5:37:26 AM						5:06:21 AM
Sunset / PM Twilight		7:46:33 PM						8:17:31 PM
Length Of Day		14:09:22
Special Conditions		None
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